Eco-Securith Assessment of Xianlin New Urban District of Nanjing,China,Using GIS Technology and Fuzzy Matter Element Analysis

An eco-security assessment index system was established,using a pressure-state-response(P-S-R)model and the analytic hierarchy process,while eco-security levels of Xianlin District before (2003) and after (2007) its construction were assessed using the GIS technology and the fuzzy matter element analysis method in a comprehensive way.The ecological security in the Xianlin New Urban District in Nanjing was evaluated.It was found that the ecological security level of Xianlin developed in two directions.The areas of both the eco-safe zone and the eco-unsafe zone increased with their proportion did from 9.6% to 22.3%,and from 12.9% to 15.0%,respectively,in the period of 2003-2007.The Qilin Subdistrict was almost at the threshold of eco-security and some others were developing from the threshold status to relatively safe one.The Qinglong Subdistrict remained almost unchanged.